How to change title via theme hook?

Question

Drupal

In the active theme file MyTheme.theme I wrote

function MyTheme_preprocess_page_title(&$variables) {
$variables['title'] = 'TEST';
}

Why can not work, tell me? It's like the hook just doesn't work.

Answer 1

So it's not your hook. The hook should be called function MyTheme_preprocess_page(&$variables) otherwise Drupal won't parse it.